diff --git a/apps/spreadsheeteditor/main/app/controller/DataTab.js b/apps/spreadsheeteditor/main/app/controller/DataTab.js
index bff7bcd91..cf8a5635c 100644
--- a/apps/spreadsheeteditor/main/app/controller/DataTab.js
+++ b/apps/spreadsheeteditor/main/app/controller/DataTab.js
@@ -113,15 +113,15 @@ define([
         },
 
         onUngroup: function(type) {
-            var me = this,
-                val = me.api.asc_checkAddGroup(true); // check ungroup
+            var me = this;
             if (type=='rows') {
-                (val!==undefined) && me.api.asc_ungroup(true)
+                (me.api.asc_checkAddGroup(true)!==undefined) && me.api.asc_ungroup(true)
             } else if (type=='columns') {
-                (val!==undefined) && me.api.asc_ungroup(false)
+                (me.api.asc_checkAddGroup(true)!==undefined) && me.api.asc_ungroup(false)
             } else if (type=='clear') {
                 me.api.asc_clearOutline();
             } else {
+                var val = me.api.asc_checkAddGroup(true);
                 if (val===null) {
                     (new SSE.Views.GroupDialog({
                         title: me.view.capBtnUngroup,
diff --git a/apps/spreadsheeteditor/main/app/controller/Main.js b/apps/spreadsheeteditor/main/app/controller/Main.js
index 6b978e8d7..572c82a64 100644
--- a/apps/spreadsheeteditor/main/app/controller/Main.js
+++ b/apps/spreadsheeteditor/main/app/controller/Main.js
@@ -1358,6 +1358,10 @@ define([
                         config.msg = this.errorNoDataToParse;
                         break;
 
+                    case Asc.c_oAscError.ID.CannotUngroupError:
+                        config.msg = this.errorCannotUngroup;
+                        break;
+
                     default:
                         config.msg = (typeof id == 'string') ? id : this.errorDefaultMessage.replace('%1', id);
                         break;
@@ -2356,6 +2360,7 @@ define([
             txtTable: 'Table',
             textCustomLoader: 'Please note that according to the terms of the license you are not entitled to change the loader.<br>Please contact our Sales Department to get a quote.',
             errorNoDataToParse: 'No data was selected to parse.',
+            errorCannotUngroup: 'Cannot ungroup. To start an outline, select the detail rows or columns and group them.',
             waitText: 'Please, wait...'
         }
     })(), SSE.Controllers.Main || {}))
diff --git a/apps/spreadsheeteditor/main/locale/en.json b/apps/spreadsheeteditor/main/locale/en.json
index da47e4477..f76a73c32 100644
--- a/apps/spreadsheeteditor/main/locale/en.json
+++ b/apps/spreadsheeteditor/main/locale/en.json
@@ -404,6 +404,7 @@
   "SSE.Controllers.Main.errorAutoFilterDataRange": "The operation could not be done for the selected range of cells.<br>Select a uniform data range different from the existing one and try again.",
   "SSE.Controllers.Main.errorAutoFilterHiddenRange": "The operation cannot be performed because the area contains filtered cells.<br>Please unhide the filtered elements and try again.",
   "SSE.Controllers.Main.errorBadImageUrl": "Image URL is incorrect",
+  "SSE.Controllers.Main.errorCannotUngroup": "Cannot ungroup. To start an outline, select the detail rows or columns and group them.",
   "SSE.Controllers.Main.errorChangeArray": "You cannot change part of an array.",
   "SSE.Controllers.Main.errorCoAuthoringDisconnect": "Server connection lost. The document cannot be edited right now.",
   "SSE.Controllers.Main.errorConnectToServer": "The document could not be saved. Please check connection settings or contact your administrator.<br>When you click the 'OK' button, you will be prompted to download the document.<br><br>Find more information about connecting Document Server <a href=\"%1\" target=\"_blank\">here</a>",